Designing a High Efficiency Flyback LED Driver with Unity Power Factor

An, Bui Duc; Phong, Nguyen Hoai; Phương, Lê Minh

doi:10.1109/icecce52056.2021.9514244

Cited by 3 publications

(1 citation statement)

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“…QR-flyback converters use the parasitic capacitance on the power switch and leakage inductance on the transformer to generate a resonant voltage when the power switch is turned off, and then the power switch can be turned on at the resonant voltage valley; therefore, soft-switching can be achieved to reduce switching losses, and electromagnetic interference can be effectively diminished. Moreover, the QR-flyback converter is an isolated SMPS because it possesses a transformer; furthermore, the QR-flyback converter can use a pulse-width modulation (PWM) control chip to correct the power factor of the input AC power; in summary, the QR-flyback converter is suitable as a driving power supply for LED array streetlamps [ 9 , 10 ]. Table 1 lists the characteristic differences between a hard-switching traditional flyback and soft-switching QR-flyback [ 7 , 8 , 11 ].…”

Section: Introductionmentioning

confidence: 99%

Development and Implementation of LED Street Lights with Bright and Extinguishable Controls and Power Converters

2023

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This study developed and implemented a driving power supply for light-emitting diode (LED) array streetlamps. The power stage was a quasi-resonant (QR)-flyback converter, its input power was the alternating-current power, and the LED array streetlamp was driven by the direct-current output power. The developed QR-flyback converter was operated in discontinuous conduction mode, and the pulse-width modulation (PWM) control chip was used to switch and conduct at the resonant valley of the drain-source voltage on the metal-oxide-semiconductor field-effect transistor (MOSFET) switch to reduce the switching loss. Moreover, the PWM control chip had a disable function, which was connected with a bright and extinguishable control circuit, and the high/low voltage level signal output by the Arduino development board can be used to control the output power of the QR-flyback converter, achieving bright and extinguishable controls for the LED array streetlamp.

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Section: Introductionmentioning

confidence: 99%